in R, suppose data frame student_courses has two columns, studentID and courseID, where each row corresponds to one student and one course that that student is taking (so there will be about five rows for each student). Suppose data frame course_info has two columns, one for the courseID and one for the full name of the course. You want a version of student_courses that includes the course names, so you write something like *_join(student_courses, course_info). *_join would actually be what function?

A. inner_join()

B. left_join()

C. right_join()

D. full_join()